98.82% is the change from 255 to 507
Calculation steps:
[( 507 - 255 ) ÷ 255] x 100 = 98.82%
Formula
Percentage change = [(507 - 255) / 255] x 100
Subtract the new number by the original number
507 - 255 = 252
252 ÷ 255 = 0.9882352941176471
0.9882352941176471 x 100 = 98.82%